Balancing machine.



J. A. JUST.

BALANCING MAGHINE.

APPLICATION FILED Nov. 22, 1900.

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1. A. 10mm;

BALANCING MACHINE.

APPLICATION FILED NOV. 22, 1909.

1,O03,'753. Patented'Sept. 19,1911.

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UNITED OFFICE.

JEAN ANATDLE JOST, 0F PARIS, FRANCE. ASSIGNOR TO SOCIETE JOST 0118., OFPARIS, FRANCE.

BALANCING -MACHINE.

Specification of Letters Patent.

Application filed November 22, 1909.

Serial No. 529,400.

To all whom 'it may concern:

Be it. known that I, Jam: ANA'ronn J os'r, a citizen of the FrenchRepublic, residing at Paris, in France, have invented certain new anduseful Tmprtwemcnts in Balancing-Ma chincs, of which the following is aspecification.

This invention relates to a balancing. machine with circular tracks, byn'ieanaot' which the 'laults in the equilibrirun or balance of elementsoi any form provided with a materialized or non-materialized symmetricalaxis, can be accurately indicated and ascertained, and in the majorityof ca scs the exact place may be determined at which the mass intendedto complete the equilibrium of the part should be added.

The principle of this machine consists in doing away with or reducing toa minimum all resistances to the oscillations of the ole ments to bebalanced.

'l he machine comprises perfectly balanced disks or drums rotating withvery possible.

slight friction on plain,- ball or roller bearings.

The another. the relative position and the dimension of the circulartracks can vary according to the shape or the dimensions of the elementsto be lnilancod, without departinc from the spirit of this invention.

Figures 1-3 show a construction of this machine in which the elements toimbalanced such as a are placed on the machine, simply resting on twosets of hearing means. each comprising a large disk I: on which theelement is placed directly, a movable stop roller 0 and a stop- (Z, theworking of which will be explained. The two sets of bearing means aresliding and adjustable as regards their distance 9. .art, being operatedby the hand wheel a. The element a rests on two disks bfoutside of andas close as possible to the vertical line passingthrough the center g ofthe said disks, so that it always rests against the stop rollers 0 whichhold it. The latter being exposed thus to a pressure reduced to aminimtnn, the resistance to the oscillations of the part becomes asslight as In order to obtain this result, the position of the saidrollers'is varied to suit the diameter of the element. to be balanced.To that end, they are mounted respectively each on a support it movableabout a'spindlc which can, be the same as, or different from, that ofthe disk I). The said supports can he moved as shown in the d rawing, bymen 11s of a screw 2' passing through the end of the support and a nut7.: fixed to the l'ra1nc and arranged to project into the slot. I of thesaid support-end. The said slot. has divisions on the edge, so that themovement of each of them can be regulated to suit the diameter of theparts to be balanced. Moreover, to avoid. any janmiing. it is necessarythat the points of contact of the spindle of the clement u with the stoprollers 0 should be as near as possible to, and below, the horizontalline passing through the axis of the said part. At the upper portion ofthe supports 11. therefore there is arranged a slide m by ulcans ofwhich the position 0.! the rollers can be regulated. The said slide mayalso be provided with divisions.

, Fig. 4 shows an arrangement suitable for balancing those elements ofwhich the principal portion overhangs the end of a spindle, whichnecessitate the relative nmvonnsnt of the two sets of disks which canalways be re: ically adjustable or not and also ad.- justablo or not asregards their distance apart.

Fig. 5 shows a suitable device for balanciug on an inner circular trackand corn prises a single drum (1 adapt'nl to rotate in a suitable frame.the element to be balan ed being placed in the interior of said drum.ll; will be understood that the said element will act in the interior ofthe drum as it would have acted on the apparatus hereinbelore described.in case of elements of considerable length, the machine could beconstituted by two apparatus with a drum identical to that hcreinbet'oredescribed, facing each other, and adprstablc vertically.

and also as regards their distance apart, or not adjustable.

Fig. 6 shows a device in which the part rests on two bearings 71 eachconstituted by two disks 4 which are mounted so as to overlap. Theposition of the system is ad justablc both as regards their distanceapart and their vertical position as already stated, but the distanceand the relative posi .ion of the disks of one and the same bearing areinvariable. This arrangement which ren-' ders the machine moreeconomical, has on the other hand the disadvantage of considerablyreduc,in its sousitiveness owing to the jamming which takes placebetween the part a and the disks 9, which etlects the Patented Sent. 1a,1911.

is secured to the end of the spindle of the. -part to be balanced, andcarries a rule or bar 8 with divisions, in front of which can be movedwith all desired accuracy a slide or suitable standard mass 25. When aper feet balance is obtained, the standard weight 2? is in thediametrica'l plane which -must contain the balancing weight.

The standard. weight being known, its distance from the axis is read onthe divided bar 8, and the value of the balancing mass is calculatedtaking into account the position which it can occupy on the element.In,the'

case of balancing elements of a certain "length, the position of theweight on the circumference of which has been determined, it will benecessary to determine the zone in which the balance weight has to beplaced. To that end is used a frame u (Figs. 8 and 9) provided with fourpivots m on which it is balanced in every direction. The element to bebalanced is placed in the said frame,

. so that its theoretical center of gravity should' be exactly ,attheintersection of the axes of the pivots w. The latter are hollow in orderto afford passageto the spindles .of the elements when they are providedwith spindles, or in order to receive the fixine means suitable to thegform of the elements. The weighted part of the circumference being atthe bottom, the position which the "element will assume, will indicatethe desired position relatively'to the diametrical plane of the saidcircumference. The frame in question can also be used for balancing 7elements in any direction.

hen it is desired to determine more exactly the place which is to beoccupied by the balance weight, the means shown .-in Fig. 7, or thatshown in Figs. 8 and 9,

is used,.constituted' by a beam 0) with variable points of engagementson which is shifted a movable weight for bringing the i frame'u intoequilibrium horizontally.

What I claim as my invention and desire to secure by Letters Patent is Abalancing machine having two systems of sliding tracks comprisingrespectively a circular plate freely rotating around its axis, anarmadjustable around the axis of said plate and having a slot in theextremity thereof, a roller rotating freely around its axis and mountedin said slot and a lateral stop carried by the axis of said plate, the

roller and the stop combining for support- I ing the element to bebalanced on" the peand distance apart,

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

} JEAN'ANA'IOLE' os r. v Witnesses: I

H. C. 00x12,

Gnomes BONNEUIL.

.riphery of the plates of; the two systems --which are adjustable as torelative height

